Transnational textile companies claim to have put in a place processes of corporate social responsibility to promote ethical behaviour in regard to the economy, environment, and populations within which they operate. However, their true conduct, behind the mask of marketing campaigns, may be better defined as corporate social irresponsibility. The objective of this study was to analyze and explore the processes of CSiR within the textile sector as being the rule and not the exception. A broad review of the available literature was carried out, both as a literal and conceptual analysis, covering 133 approaches to the hitherto undefined concept of CSiR. In addition, a Google frequency count was performed, with a saturated categorization using the five dimensions into which the CSiR processes are concentrated: ethical, legal, social, economic, and environmental. The methodology used was based on a higher order association of these hierarchies, for which a triad model was established, allowing the most representative combinations to be identified. This methodology demonstrated that the environmental dimension is of residual character, while allowing the definitions of greater weight and scope to be extracted. From these, it was inferred that the current concept of CSiR is best defined in a three-fold legal-social-ethical category, based on its frequency of use in Google, its effective application, and scope. The definition provided by this study may contribute to the improvement of the ethical processes of entrepreneurship and CSR by highlighting their taxonomy of inconsistencies, rather than focusing on the preconceived benefits of their actions.
A new donor-bridge-acceptor (D-B-A) dyad consisting of ruthenium(II) and iridium(III) species separated by an homoconjugated bridge derived from 7,7-diphenylnorbornane [Ir-Nor-Ru](3+) has been synthesised. The photophysical and electrochemical properties of the heterodinuclear complex have been compared with those of the analogous homodinuclear complexes [Ru-Nor-Ru](4+) and [Ir-Nor- Ir](2+) . Transient absorption spectra on the nanosecond and sub-picosecond timescales show, for the first time, that an homoconjugated bridge can mediate efficiently in the photoinduced energy transfer from the iridium(III) to the ruthenium(II) centres according to a Dexter-type mechanism.
Efficient electron delocalization by aromatic homoconjugated 7,7-diphenylnorbornane (DPN) in alternated homoconjugated-conjugated block copolymers and reference compounds is revealed by photophysical and electrochemical measurements. The synthesis of the polymers was achieved by Suzuki polycondensation reaction. Effective electron delocalization by DPN is demonstrated by the significant red shifts observed in the absorption and emission spectra and the variation of the energy band gap of the polymers and monomeric model compounds in comparison to a series of oligophenylenes used as references (p-quaterphenyl, p-terphenyl, and biphenyl). The electron delocalization is also clearly demonstrated by the lower oxidation potential measured for homoconjugated model compound in comparison to p-terphenyl. The results show that the electron delocalization caused by two homoconjugated aryl rings is comparable to the effect produced by one conjugated aryl ring.
A joint computational-experimental study has been carried out to analyze the homoconjugative interactions in 7,7-diarylnorbornane (DPN) derivatives. The experimentally observed new bands in their UV/Vis have been accurately assigned by means of TD-DFT calculations. Both experimental data and computations show that aromatic homoconjugation in acyclic systems is an effective mechanism for electron delocalization that resembles the situation described for polyphenylenes and polyenes. The effective homoconjugation length in homoconjugated oligomers is in the range of 6-7 aryl rings. The effect of substituents directly attached to the para carbon atom of the DPN moiety have been also studied. We found that the HOMO→LUMO vertical transitions can indeed be modified by the nature of the aromatic substituents in order to provoke dramatic changes in the electronic properties (i.e., in the absorption spectra) of the studied species.
A new molecular receptor (1) for ammonium recognition has been designed and constructed by using only carbon atoms. This molecular receptor can co-exist in two different isoenergetic conformations but, upon complexation, the conformers are no longer isoenergetic, and a basket-shaped conformation becomes clearly more stable. The pre-organised tetrahedral structure of this basket-shaped molecule favours the complexation of ammonium ions by N-H⋅⋅⋅π interactions with the four phenyl groups of the host. A similar behaviour is not observed in a similar, but less pre-organised, reference molecule. ESI-MS competition experiments show that 1 is able to bind NH(4)(+) over K(+) selectively. This is the first example of a neutral molecular receptor that shows a remarkable NH(4)(+)/K(+) selectivity. DFT-calculations provide insight into the nature of host-guest interactions of both 1⋅NH(4)(+) and 1⋅K(+) complexes as well as in the mechanism involved in multiple cation-π interactions and the influence of these interactions on the conformational stability and the selective binding of the host.
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